Load your map in Map Maker then click the Export button. In your exports folder you will find your exported files including .fhm (the map file itself), .fho (the object groups you used), .fhs (the sky you used), .fhw (the weather cycle you used). You need to find these files then put them all in a compressed folder. Upload it to mediafire or another file sharing website then give your group the link.
All they have to do is download it and put all the files into their exports folder, from there you and your friends have to find the map portal in Cape.